Re: 5ktq rear brake problems

["Fred Munro" <munrof@isys.ca>]

Hi Larry;

    The proportioning valve is located in the main brake line at the rear of
the car. It is connected by a spring to the rear suspension. The function is
to adjust line pressure to the rear brakes in proportion to the load in the
car. It will not affect the operation of your front brakes.
    If your front brakes are not working, check for seized caliper guide
pins, seized pistons, air in the hydraulics, or a bad master cylinder. Since
most of the braking effort comes from the front brakes, you should notice a
reduction in braking performance if the front brakes are not working
correctly.

HTH

Fred Munro
'91 200q  271k km
----- Original Message -----
From: Larry Mormino <mormino@lynxus.com>
To: Phil Payne <quk@isham-research.demon.co.uk>; <j-yr-be@snet.net>
Cc: <quattro@coimbra.ans.net>
Sent: Monday, April 05, 1999 1:20 PM
Subject: Re: 5ktq rear brake problems


> My 89 200t has the reverse problem; the fronts appearantly have stopped
> working. I think this because of the dust on the wheels. It used to be
that
> the fronts would get dirty and the rears would stay clean. Now the fronts
> stay clean and the rears get black. Could this be the proportioning value?
> Where is it located? Is it fit by replace or adjust/clean? Larry
>
> ----- Original Message -----
> From: Phil Payne <quk@isham-research.demon.co.uk>
> To: <j-yr-be@snet.net>
> Cc: <quattro@coimbra.ans.net>
> Sent: Monday, April 05, 1999 1:07 PM
> Subject: Re: 5ktq rear brake problems
>
>
> > In message <370905F9.1C5CE56F@snet.net> Jay Rabe writes:
> >
> > >     I am trying to get rear brakes working on an 86 5ktq (with abs).
I
> > > put new calipers on the rear and a new brake prop. valve.  When i
bleed
> > > the brakes, fluid comes out solid, no bubbles.  Pushing the brake
pedal
> > > as hard as possible, you can turn the rear wheel with your hand.  I
> > > cannot figure this out.  Fluid sprays out of abs unit when i loosened
> > > the line out, but out of the caliper bleeder it comes slow.
> >
> > Proportioning valve.
> >
> > --
> >  Phil Payne
> >  Phone: 0385 302803   Fax: 01536 723021
> >  (The contents of this post will _NOT_ appear in the UK Newsletter.)
> >
> >
>